Sign Up Successful!
You now have access to more from Realmo!
Property Lookup
    Property Lookup
    • For Sale
    • For Lease
    • Recently Sold
    • Property Lookup
    • Brokers
    AI Search
    Back to Search
    The Largest CRE Database in the US with Over 1 Million Listings
    Property profile & analytics

    521 Walnut St Darby, PA 19023-2438

    • Warehouses
    • 8,000 SF
    • 0.18 lot acres
    OFF-MARKET
    Value Estimations
    Cap Rate Potential
    Location Intelligence
    Property ID
    US73-1696809
    The Realmo ID is a unique identifier assigned to every property, incorporating country codes and precise geo-coordinates for 300x300-foot land blocks. It enables standardized data collection and seamless integration of disparate sources such as ownership, tax, title data and physical specifications. By aggregating current and historical records, the Realmo ID powers advanced analytics and delivers deep, verifiable insights for real estate professionals.

    Current Use by Public Records

    • Tender Years Preschool / Child Care Agency

    Property Details for 521 Walnut St

    Year built
    1920
    Lot size
    0.18 lot acres
    Property size
    8,000 SF
    Property type
    Warehouses
    APN
    14-00-03628-00
    APU
    14000362800

    Value Estimations

    based on Realmo’s proprietary methodology

    • AI approach

    • CAP approach

    • Comparable approach

    • Alternative Use

    Get a detailed, property-specific valuation — fast and free

    Location Insight

    • Map
    • Local Demand
    City
    Darby
    County
    Delaware
    State
    Pennsylvania
    Longitude
    -75.2555
    Latitude
    39.9157
    CBSA code
    37980
    CBSA name
    PHILADELPHIA-CAMDEN-WILMINGTON, PA-NJ-DE-MD METROPOLITAN STATISTICAL AREA

    Property Tax & Assessments

    Tax date
    Tax Amount
    Assessed Land Value
    Assessed Improvement Value
    Total Assessed Value
    Applied Tax Rate
    Land Market Value
    Improvement Market Value
    Total Market Value
    2024
    $10,118
    $41,160
    $179,660
    $220,820
    -
    $0.00
    $0.00
    $220,820

    Comparable in this City

    • Value Estimation by Request
      2,048 SF

      206 Frnt St

      WAREHOUSE, STORAGE • 2,048 SF
      206 Frnt St, Darby, PA 19023-2933
      View Details
    • Value Estimation by Request
      3,384 SF

      308 3rd St

      WAREHOUSE, STORAGE • 3,384 SF
      308 3rd St, Darby, PA 19023-2806
      View Details
    • Value Estimation by Request
      4,433 SF

      5th St

      WAREHOUSE, STORAGE • 4,433 SF
      5th St, Darby, PA 19023
      View Details
    • Value Estimation by Request
      5,305 SF

      1220 Macdade Blvd

      WAREHOUSE, STORAGE • 5,305 SF
      1220 Macdade Blvd, Collingdale, PA 19023-4042
      View Details
    • Value Estimation
      $840,000
      12,020 SF

      925 Main St

      WAREHOUSE, STORAGE • 12,020 SF
      925 Main St, Darby, PA 19023
      View Details
    • Value Estimation by Request
      6,600 SF

      8 Wolfenden Ave

      WAREHOUSE, STORAGE • 6,600 SF
      8 Wolfenden Ave, Darby, PA 19023
      View Details

    Similar Nearby for Sale

    • $750,000
      24,730 SF

      Darby Industrial Warehouse - $750k

      Spacious Darby warehouse, I-95 access.
      611 Columbia Ave, Darby, PA 19023
      View Details
    • $799,900
      6,560 SF

      Darby Auto Lot - High Visibility!

      Prime Darby location, 6,560 sq ft, 50-60 car capacity.
      77 Chester Pike, Darby, PA 19023
      View Details
    • $410,000
      1,800 SF

      MacDade Boulevard Storefront For Sale

      Prime Collingdale Retail Space, High Visibility
      721 Macdade Blvd, Collingdale, PA 19023
      View Details
    • $200,000

      Multi-Unit Property with Storefront Potential

      Multi-unit property with storefront potential, ideal for investors.
      134 Macdade Blvd Blvd, Darby, PA 19023
      View Details
    • $410,000
      3,600 SF

      Mixed-Use Property with Apartments

      3,600 SF commercial space with apartments for sale.
      721 Macdade Blvd, Darby, PA 19023
      View Details
    • $599,000
      4,544 SF

      Versatile Mixed-Use Property, Darby PA

      High-visibility location suitable for medical, office, commercial, or mixed-use purposes.
      115 Clifton Ave, Darby, PA 19023
      View Details

    Similar Nearby for Lease

    • Contact for pricing
      4,000 SF

      4,000 SF Warehouse with Storage

      Warehouse with secured lot, close to I95 and Philadelphia.
      900 North St, Darby, PA 19023
      View Details
    • Contact for pricing
      16,800 SF

      Retail Space Available For Lease

      Retail property available for lease, offering 16,800 square feet.
      150 South Macdade Blvd, Darby, PA 19023
      View Details
    • New
      $4,300 /Mo

      Renovated Medical Office in Darby

      Recently renovated medical office space available for lease in Darby.
      869-871 Main St, Darby, PA 19023
      View Details
    Request Owner's contact information
    Message sent successfully
    Error
    If you are the owner or broker of this property and would like to edit or remove this listing please send a message to web site administrator.
    521 Walnut St
    Darby, PA 19023-2438
    Message sent successfully
    Error
    Email to Your Friends
    Link copied to clipboard
    Separate multiple addresses with a comma
    Message sent successfully
    Error

    Realmo Value Estimations

    Realmo estimates a property’s market value using a proprietary methodology that incorporates public data and user-submitted information. This cumulative value is generated by integrating a variety of conventional and innovative methods. 

    Disclaimer

    These figures are not official appraisals and should not be used as a substitute for a valuation performed by a licensed appraiser.
    Actual market value may differ due to factors not captured in the data. Estimates are offered for informational purposes only, and users should conduct independent research before making financial or investment decisions.
    By using this feature, you acknowledge that Realmo is not responsible for actions taken based on these estimates.

    AI approach

    Realmo AI Method estimates property value using machine learning models trained on millions of comparable listings, transactions, and market signals. It analyzes property features, location intelligence data, and current market dynamics to predict the most probable market value in real time.

    Realmo CapRate Calculation

    Realmo calculates the Capitalization Rate (Cap Rate) to help estimate a property's potential return on investment. The Cap Rate is a fundamental metric in commercial real estate that measures the relationship between a property's net operating income and its market value.

    How We Calculate Cap Rate

    Cap Rate Formula:
    Cap Rate (%) = (Net Operating Income / Property Value) × 100

    Net Operating Income (NOI) Formula:
    NOI = Area × Lease Rate × (1 - Vacancy Rate) × (1 - Operating Expense Ratio)

    Components

    Net Operating Income (NOI) represents the annual income a property generates after operating expenses:

    • Area: Building square footage from property records
    • Lease Rate: Annual $/sqft based on market data for the property type and geographic location
    • Vacancy Rate: Percentage of unoccupied space based on market data for the property type and location
    • Operating Expense Ratio: Operating costs as a percentage of income, varies by property type

    Property Value is derived from:

    • Recent sale price (if available)
    • Statistical models using comparable sales
    • AI-powered valuation estimates

    Example Calculation

    For a 100,000 sqft Office Building:

    • Lease Rate: $25.00/sqft/year (market data for Office in this area)
    • Vacancy Rate: 8% (market data for Office in this area)
    • Operating Expense Ratio: 35% (typical for Office properties)
    • Property Value: $15,000,000

    Step 1: Calculate NOI

    NOI = 100,000 × $25.00 × (1 - 0.08) × (1 - 0.35)
    NOI = 100,000 × $25.00 × 0.92 × 0.65
    NOI = $1,495,000/year

    Step 2: Calculate Cap Rate

    Cap Rate = ($1,495,000 / $15,000,000) × 100
    Cap Rate = 9.97%

    Property Type Considerations

    Net Operating Income calculations vary by property type due to different operating expense ratios:

    • Office: Higher expenses (30-40%) for HVAC, utilities, maintenance
    • Retail: Moderate expenses (25-35%) for common area maintenance
    • Industrial/Warehouse: Lower expenses (15-25%) for minimal tenant services
    • Multifamily: Moderate expenses (35-45%) including property management
    • Self-Storage: Lower expenses (25-35%) due to minimal maintenance

    Market lease rates and vacancy rates are specific to each property type and geographic location, reflecting local market conditions.

    Disclaimer

    These calculations are estimates for informational purposes only and should not be used as a substitute for professional financial analysis or appraisal.

    • Cap Rate calculations depend on market data that may change over time
    • Actual operating expenses, lease rates, and vacancy rates may differ from market averages
    • Individual property conditions, lease terms, and tenant quality significantly impact actual NOI
    • Property value estimates are approximations and not official appraisals
    • Cap rates vary widely by market, property condition, and investment risk profile

    Professional Guidance Recommended: Before making any investment or financial decisions, consult with licensed appraisers, commercial real estate brokers, and financial advisors who can evaluate your specific property and circumstances.
    By using this feature, you acknowledge that Realmo is not responsible for investment decisions or actions taken based on these estimates.

    Cap approach

    Capitalization Method calculates value based on estimated net operating income (NOI) and applying a market-based capitalization rate (cap rate), we estimate what a typical investor might be willing to pay for it.

    Comparable approach

    Comparable estimate is based on recent sales of similar nearby properties, adjusted for factors like size, condition, and location.

    Relative

    Relative property class coefficient uses factors that account for typical price differences between various asset types (e.g., retail vs. industrial) to provide a more accurate market-aligned estimate.

    Geo

    Comparable Sales Method, enhanced by Geo coefficients — location-based adjustment factors that reflect differences in price levels across neighborhoods, cities, or regions ensuring a more accurate, market-sensitive valuation.

    Stat Estimate

    This method estimates value based on actual market adjusted recent (~5 years) sales of comparable properties around by location and property type.

    • Ranges - area data calculated by industry standard IQR Outlier Removal Method
    • Range-from: 75% of all similar sales ($/sqft) are above this value
    • Range-to: 75% of all similar sales ($/sqft) are below this value
    AI Estimate

    This method estimates value based on AI market estimation of comparable properties around by location and property type.

    • Ranges - area data calculated by industry standard IQR Outlier Removal Method
    • Range-from: 75% of all estimations ($/sqft) are above this value
    • Range-to: 75% of all estimations ($/sqft) are below this value
    Alternative use

    Estimate considers the property’s potential value if used for a different purpose-based on zoning, demand, and market feasibility.

    More about this property
    Thanks! Your message was sent.
    Error! Your message wasn't sent.
    Please enter your name
    Please enter email
    Please enter the email in the correct format
    Please enter phone
    Please enter the number in the correct format
    Please enter message
    Thank You

    You are Unsubscribed From Notifications

    Google sign-in failed. Please try again or use another login method.
    Create New Password
    • At least 8 characters
    • Contains both letters and numbers
    • Contains uppercase and lowercase letters
    • At most 32 characters
    • Password required
    • Password reset link has expired. Please request a new one.